Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a frequência de Walterboro, SC?
 ###Tabelas: CREATE TABLE translators (translators_id AUTO_INCREMENT PRIMARY KEY, Call sign VARCHAR, Frequency MHz VARCHAR, City of license VARCHAR, ERP W INT, Class VARCHAR, FCC info VARCHAR) CREATE TABLE kuopio (kuopio_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Name VARCHAR, Nationality VARCHAR, 1st (m) VARCHAR, 2nd (m) VARCHAR, Points VARCHAR, Overall NT points VARCHAR, Overall WC points (Rank) VARCHAR) CREATE TABLE final_wildcards (final_wildcards_id AUTO_INCREMENT PRIMARY KEY, Draw INT, Artist VARCHAR, Song VARCHAR, Televote VARCHAR, Place INT) CREATE TABLE 2008_squad_statistics (2008_squad_statistics_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Position VARCHAR, Previous Club VARCHAR, Apps INT, Tries INT, Goals VARCHAR, Points INT) CREATE TABLE results_by_year (results_by_year_id AUTO_INCREMENT PRIMARY KEY, Year INT, Men's Open VARCHAR, Women's Open VARCHAR, Mixed Open VARCHAR, Men's u20 VARCHAR, Women's u20 VARCHAR, Senior Mixed VARCHAR, Men's 30 VARCHAR, Women's 30 VARCHAR, Men's 35 VARCHAR, Women's 35 VARCHAR, Men's 40 VARCHAR, Women's 40 VARCHAR, Men's 45 VARCHAR, Men's 50 VARCHAR)  
SELECT Frequency MHz FROM translators WHERE City of license = walterboro, sc